45acp large flash hole

DuckTape

DuckTape

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Hi all,

I was checking the flash hole on a couple of 45acp case I was reloading when I notice a larger that normal flash hole :runaway:.

I check several other cases and found some other cases with the same configuration and they where all Winchester cases.

Is there any danger :eek: in using case with large flash hole or is this a normal occurrence which I should not bother :shotgun: ???

Appreciate your help.

Ducktape :D
 
My guess is you've found some cases that were originally loaded as "Non-Toxic", or NT ammo. Winchester uses a different priming compound, one that does not contain Lead, in the NT ammo. You will probably find a NT on the headstamp. You will probably also be seeing a small pistol primer pocket. Winchester says not to reload them, but lots of people are.
 
All the Winclean .45 ACP that I've fired had small primer pockets rather than the usual large pocket. I put 'em in the brass bin.
 
i liked the nt(winclean) stuff so much as i went so far as to change the primer feed on my press- now when i want to change from 9mm to 45 all i have to do is change the shellplate and head- it feeds just as well if not better, and there's NO DIFFERENCE IN PERFORMANCE
 
I was sorting through spent shells between Win nt and ICC. They both have small primer holes but I noticed that ICC has bigger hole going into the powder. Is there any significance to this since ICC might have less restriction on the fired primer? Thanks all.
 
I noticed the same thing a couple of years or so ago. The normal size is .080 and I found some brands that were .099 and the Winclean were .135". The loaded them all the found that the larger flash brass had slightly lower velocity. Sightly like 10 to 15 fps between sizes. Got to say the once fired Winclean were clean on the inside.
 
Very large 45acp flash hole

Hi all,

Just to let you know that I did more checking up on the cases I have and I found a total of 13 cases with very large flash hole on approximately 500 cases :p .

Here is the breakdown :

9. Winchester 45 auto
2. W-W 45 auto
1. Federal 45 auto
1. Speer 45 auto​

No NT marking but not impossible that they are non-toxic that I do not know.

Since I have so few, I will put them in my copper recycling bin :shotgun: .

Thank you all for the info.

Ducktape
 
Those nt cases caused me grief in my lee turret loader...till i saw the little flash holes. I kept squashing new large pistol primers. Trashed them all.
 
Additional info

Hi there all,

Just to clear up any confusion in my description of the flash hole :confused: .

I was not referring to the primer hole but to the "see true hole" that allow the primer to ignite the powder.

Note : I de-prime 500 cases (more or less) without reloading them to check this out :eek: .

Sorry for any misinformation on my part :redface: .

Yours truly,

Ducktape
 
that would be your FLASH HOLE- the other is properly called a PRIMER pocket- or at least that what my manual says- in the old days we used to call it a touch hole, left over from m/l days-
 
Your nomaclature was correct, but I, too, began to think you meant the primer hole.

Changes in flash hole will change pressure and velocity, so don't mix them.

Research has shown that pressure variations are inversley proportionate to flash hole size. The best numbers come from Berdan cases, which have really tiny flash holes.
 
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